JP3023281B2 - Construction structure of slab base material on tunnel lining wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel, such as a common ditch, in which the inner space is divided into a plurality of sections by partition walls and different public facilities are disposed in the respective divided spaces, and in particular, the inner space is vertically divided. The present invention relates to a structure in which a slab base material serving as a framework of a partition wall is installed between side walls of a tunnel lining wall.

[0002]

2. Description of the Related Art As is well known, in a tunnel in which a plurality of facilities are laid, there is a so-called common ditch in which the inner space is divided into a plurality of sections by partition walls and utility facilities are laid in the divided spaces. FIG. 5 shows an example of the common groove. The common groove 1 has a vertically long cross-sectional shape composed of a primary lining wall 2, a secondary lining wall 3, and partition walls 4, 5, and a constant inner space width. It has an oval shape. The partition wall 4 partitions the inner space of the tunnel up and down at the center, and the partition wall 5 divides the upper space divided by the partition wall 4 into right and left, thereby forming spaces 6, 7, and 8. . For example, in each of the spaces 6, 7, and 8, a water pipe 11 (water or sewer pipe), an electric wire 12, a gas pipe 13, and a telephone cable 14 are provided, respectively.

[0003] In order to construct the above-mentioned common groove 1, first, the ground is excavated, and reinforced concrete segments 15 previously manufactured in a factory or the like are carried into the excavation hole, and these segments 15 are put along the inner wall of the excavation hole. The primary lining wall 2 is constructed by coupling. Next, a reinforcing bar and a formwork are installed on the inner surface of the primary lining wall 2 and positions where the partition walls 4 and 5 are to be formed, and concrete is poured into the formwork to form the secondary lining wall 3 and the partition wall. 4 and 5 are formed.

[0004]

In the operation of forming the partition walls 4 and 5 of the common groove 1, the efficiency of the operation of installing reinforcing bars and formwork in the primary lining wall 2 formed in the ground is improved. In particular, the partition wall 4 extending laterally is required to have strength as a structural member for supporting the earth pressure from the surroundings, that is, the horizontal load, via the side wall 2a of the primary lining wall 2, so that the reinforcing steel is internally provided. It is necessary to arrange a large number of these, and the work of forming the partition walls 4 also determines the speed of the entire construction work of the common groove 1, and there has been a demand for an improvement measure capable of improving the work efficiency and streamlining the work.

The present invention has been made in view of the above circumstances, and a slab base for a tunnel lining wall capable of reducing labor and improving the efficiency of forming a partition wall in the tunnel lining wall. It is intended to provide a construction structure of the material.

[0006]

According to the present invention, there is provided a structure for laying a slab base material on a tunnel lining wall according to the present invention. A slab base is formed on the slab base on both sides of the lining wall, and a protrusion having a mounting surface for the slab base is formed on the inner surface of the protrusion. The steel plate is buried with the part protruding inward,
At both ends of the slab base material, a mounting portion having a bonding surface to be fitted to the mounting surface and a mounting surface to be mounted on the steel plate is formed, and the bonding surface of the mounting portion is aligned with the mounting surface of the protruding portion. The mounting surface is mounted on a steel plate, and thereafter, the mounting portion is fixed to the protruding portion by fixing means.

The mounting surface of the projecting portion of the lining wall is formed substantially in the vertical direction, and the steel plate is provided on the inner surface of the projecting portion with its surface substantially in the vertical direction. Being buried, and further in the steel plate,
It is characterized in that an extension part extending outwardly of the projection part and embedded in the projection part is integrally formed.

[0008]

According to the present invention, the slab substrate is carried into the erection position with the mounting surface of the mounting portion facing downward in the space above the protrusion formed on both side walls of the tunnel lining wall. ,
Then, the slab base material is lowered, the joining surface is adjusted to the mounting surface of the protruding portion, and the mounting surface is placed on the steel plate. Thereafter, the mounting portion is fixed to the protruding portion by the fixing means. Since the steel plate receives the shearing force applied to the slab base material, the opposing force to the shearing force is improved, and the thickness of the protruding portion can be suppressed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. In this embodiment, the common groove 1 shown in FIG.
First, in the same way as in the prior art, excavation is performed in the ground, segments 15 made of reinforced concrete are carried into the excavation hole, and these segments 15 are connected along the inner wall of the excavation hole. The primary lining wall 2 is constructed. A projecting portion 20 projecting inward is integrally formed at a position where the partition wall 4 is formed in the opposing segments 15 constituting the side wall 2 a of the primary lining wall 2. These projections 20 are formed in the segment 15 so as to be located substantially at the center of the side wall 2a, and extend in the longitudinal direction of the tunnel. Then, the partition wall 4 is formed by erection of the slab base material 30 between the projecting portions 20.

As shown in FIG. 1, the projecting portion 20 has a substantially trapezoidal cross section and a vertical mounting surface 21a formed on the upper portion.
The slab substrate 30 is attached to the mounting surface 21a as described later.
A plurality of insert fittings 22 for fixing bolts are buried in the longitudinal direction of the tunnel. Inner surface 2 of protrusion 20
1b, a part of its thickness protrudes inward below the mounting surface 21a, and the protruding surface is vertical.
Is buried. The steel plate 50 is integrally embedded in the segment 15 by an anchor 60 fixed to the inner surface.

In place of the steel plate 50, an angle steel plate 50 having an L-shaped cross section as shown in FIG.
b. In this case, one side material of the angle steel plate 50 extends outward as the extension portion 51 and is embedded in the protruding portion 20. In the case of the example of FIG. 4, since the extension portion 51 is formed and buried in the protruding portion 20, no anchor is particularly required.

Now, the slab substrate 30 is shown in FIGS.
As shown in FIG. 3, mounting portions 33 to the side wall 2a of the primary lining wall 2 are formed at both ends of the base body 32 integrally formed by welding the flange portions 31a of the three H-section steels 31, respectively. It is configured. At both ends of the base body 32, rectangular mounting plates 35 are fixed by welding. Elongated holes 35 a extending in a direction perpendicular to the mounting plate 35 are formed at both ends of the mounting plate 35 and at portions located outside the web 31 b of the H-shaped steel 31 on both sides. The distance between the elongated holes 35a at both ends coincides with the distance between the insert fittings 22 embedded in the protruding portion 20 of the primary lining wall 2.
The outer surface of the mounting plate 35 serves as a joining surface 36 that matches the mounting surface 21 a of the protrusion 20. In addition, the lower surfaces at both ends of the slab base material 30 including the lower surface of the mounting plate 35 serve as the mounting surfaces 37 of the mounting portions 33.

[0013] The slab base material 30 is placed on the projection 2
In order to install the slab base material 30 above the projecting portion 20, as shown by a two-dot chain line in FIG.
Then, the slab substrate 30 is lowered at a position where the slab substrate 30 is to be erected, with the mounting surface 37 facing downward and in a substantially horizontal state. 21a, the placing surface 37 is placed on the upper end surface of the steel plate 50, and the position is adjusted in the longitudinal direction of the tunnel, and the long hole 35a is inserted into the insert fitting 22.
Adjust to Then, from the inside of the mounting plate 35, a long hole 35a
Then, the mounting plate 35 is fixed to the protruding portion 20 by screwing the bolt 40 passed through the mounting member 22 into the insert fitting 22. In the case of the present embodiment, the bolt 40 and the insert fitting 22 are fixing means.

The slab substrate 30 fixed to the primary lining wall 2 in this manner is arranged and fixed at predetermined intervals in the longitudinal direction of the tunnel over the entire length of the tunnel.
Reinforcing bars and formwork are installed between the slab base materials 30 and on the inner surface of the primary lining wall 2 and concrete is poured into the slab base material 3.
A concrete layer is provided between the upper and lower surfaces 0 and the slab base material 30 to form a partition wall 4 for vertically dividing the inside of the common groove 1 and integrally form a secondary lining wall 3 (see FIG. 5). ). When the mortar or the like is to be filled in each H-shaped steel 31 constituting the slab base material 30, a hole is formed in the flange portion 31a in advance.

According to the erection structure of the slab substrate 30,
Projection 2 formed on opposite side wall 2a of primary lining wall 2
The mounting plates 3 at both ends of the slab substrate 30 are
5 and the mounting surface 37 is placed on the upper end surface of the steel plate 50, so that it is not necessary to support the slab base material 30 until the fixing is completed. Since it is only screwed, the burden on the operator is reduced, and the slab base material 30 can be fixed to the side wall 2a very easily. The length of the slab substrate 30 can be adjusted by fixing the slab substrate 30 to the protrusion 20.
Since the length of the slab base 30 can be set to be shorter than the distance between the slab base 30
Can be carried into the tunnel, and as a result, there is no difficulty in carrying into the tunnel. From the above, the installation work of the reinforcing bar and the formwork for forming the partition wall 4 in the primary lining wall 2 is greatly rationalized, and labor and efficiency of the operation of forming the partition wall 4 inside the tunnel are reduced. Can be improved.

When a load is applied to the partition wall 4 from above after the partition wall 4 is constructed, a shearing force is applied to the slab substrate 30, and the shear force is applied to the steel plate 50, and the shear force is applied. There is an advantage that the opposing force to the force is greatly improved, the deformation of the slab base material 30 itself is prevented, the reinforcement of the partition wall 4 is achieved, and the thickness of the protrusion 20 can be suppressed.

In the above embodiment, the slab substrate 30 constituting the partition wall 4 of the common groove 1 according to the present invention has been described as an example, but the present invention is not limited to this. The present invention can be applied to any type of tunnel lining wall having a partition wall that vertically divides the inner space of the tunnel lining wall. The means for fixing the slab substrate 30 to the protruding portion 20 of the primary lining wall 2 includes a bolt 40 and an insert fitting 2.
Although the combination of the two is used, the fixing means may be appropriately selected in some cases, such as welding, riveting, and a combination of bolts and nuts.

[0018]

As described above, according to the structure for laying the slab base material on the tunnel lining wall of the present invention, the work of laying the slab base material between both side walls of the lining wall can be extremely easily performed. With the introduction of the slab substrate into the tunnel, as a result, the work of installing the reinforcing bars and formwork to form the partition walls in the lining wall has been greatly streamlined, and the partition walls have been installed inside the tunnel. In addition to saving labor and improving efficiency in forming the slab substrate, the steel plate receiving the slab substrate improves the shear resistance, strengthens the partition walls, and further increases the thickness of the protrusion connecting the slab substrate. This has the effect of suppressing noise.

[Brief description of the drawings]

FIG. 1 is a front view for explaining an embodiment of the present invention.

FIG. 2 is a back view of the slab base material of one embodiment.

FIG. 3 is a partially cutaway perspective view of a slab substrate according to one embodiment.

FIG. 4 is a front view of a state in which a modified example of a steel plate is embedded.

FIG. 5 is a cross-sectional view of an example of a common groove.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Joint groove, 2 ... Primary lining wall, 2a ... Side wall, 4 ... Partition wall, 20 ... Projection, 21a ... Projection mounting surface, 21b ...
Inner surface of protruding part, 22 insert metal fittings (fixing means), 3
0: slab base material, 32: base material body, 33: mounting part, 36
... joining surface, 37 ... mounting surface, 40 ... bolt (fixing means),
50 ... steel plate.

Continued on the front page (73) Patent holder 000150110 Takenaka Civil Engineering Co., Ltd. 8-21-1, Ginza, Chuo-ku, Tokyo (73) Patent holder 000219875 Tokyu Construction Co., Ltd. 1-16-114, Shibuya, Shibuya-ku, Tokyo (73 ) Patent holder 000198307 Ishikawajima Construction Materials Industry Co., Ltd. 1-12-1 Yurakucho, Chiyoda-ku, Tokyo (73) Patent holder 000006655 Nippon Steel Corporation 2-63 Otemachi, Chiyoda-ku, Tokyo (73) Patent Authority 000006208 Mitsubishi Heavy Industries, Ltd. 2-5-1 Marunouchi, Chiyoda-ku, Tokyo (72) Inventor Shin Shingo Kiriko 2- 10-2 Otowa, Bunkyo-ku, Tokyo Inside the Advanced Construction Technology Center (72) Inventor Hiroyuki Udagawa 2-10-2 Otowa, Bunkyo-ku, Tokyo Inside the Advanced Construction Technology Center (72) Inventor Akihiro Higashi 2-3-3 Kandaji-cho, Chiyoda-ku, Tokyo Obayashi Corporation Tokyo Head Office (72) Inventor Koji Yoshida 2-3-11 Kanda Surugadai, Chiyoda-ku, Tokyo Stock (72) Inventor Toshimi Ino 1-25-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo Taisei Construction Co., Ltd. (72) Inventor Yoshifumi Fujii 8-2-1-1, Ginza, Chuo-ku, Tokyo Co., Ltd. (72) Inventor Yuji Asakami 1-16-14 Shibuya, Shibuya-ku, Tokyo Tokyu Construction Co., Ltd. (72) Inventor Hirohide Hashimoto 2-6-121, Yaesu, Chuo-ku, Tokyo Inside Ishikawajima Building Materials Industry Co., Ltd. (72) Minoru Sanoda, Nippon Steel Corporation, 2-3-6, Otemachi 2-chome, Chiyoda-ku, Tokyo (72) Inventor Takao Matsumoto 1-1-1, Wadazakicho, Hyogo-ku, Kobe City, Hyogo Mitsubishi Kobe Shipyard, Heavy Industries, Ltd. 25195 (JP, A) JP-A-6-93795 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E04B 5/43 E21D 11/04

Claims (4)

(57) [Claims] 1. A structure in which a slab base material is erected substantially in parallel with a width direction in a middle of a vertical direction in a tunnel lining wall having a substantially constant inner space width, wherein the slab base material is provided on both side walls of the lining wall. At the erection position of the slab substrate, a projection having a mounting surface for the slab substrate is formed, and a steel plate is embedded on the inner surface of the projection, with a part projecting inward. At both ends, a mounting portion having a bonding surface to be fitted to the mounting surface and a mounting surface to be mounted on the steel plate is formed, and the mounting surface of the mounting portion is aligned with the mounting surface of the protruding portion. A structure for mounting a slab base material on a tunnel lining wall, wherein a surface is placed on the steel plate, and thereafter, a mounting portion is fixed to a protruding portion by fixing means. 2. The structure according to claim 1, wherein a mounting surface of the projecting portion of the lining wall is formed substantially in a vertical direction. 3. The slab base material for a tunnel lining wall according to claim 1, wherein the steel plate is buried in an inner surface of the protruding portion so that a surface thereof extends along a substantially vertical direction. Construction structure. 4. The tunnel cover according to claim 3, wherein the steel plate is formed integrally with an extension extending outwardly of the projection and embedded in the projection. The construction structure of the slab base material of the wall.